windows-vc-locks-and-more-20060115

windows-vc-locks-and-more-20060115

This patch fixes several issues:

 * the smb virtual circuits can be active and/or dead.   this patch
   improves the handling of vc's making the transition from active
   to dead

 * correct the refcounts on the smb_user_t and smb_vc_t objects

 * replace the deprecated GetCurrentTime() with GetTickCounts() which
   is the new name.  This function needs to be replaced with something
   else because its return value wraps after 49.7 days

 * hold the correct locks when adjusting the scp->fileLocksH queue

 * add new event log entries for unexpected session closures and
   send packet failures